'Procephalic lobe' definitions:

Definition of 'Procephalic lobe'

From: GCIDE

Procephalic \Pro`ce*phal"ic\, a. [Pref. pro- + cephalic.] (Zool.) Pertaining to, or forming, the front of the head. [1913 Webster]
Procephalic lobe (Zool.), that part of the head of an invertebrate animal which is in front of the mouth. [1913 Webster]